Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/gmd-2017-286
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Model description paper
22 Feb 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).
ICON-ART 2.1 – A flexible tracer framework and its application for composition studies in numerical weather forecasting and climate simulations
Jennifer Schröter1, Daniel Rieger1,3, Christian Stassen1,a, Heike Vogel1, Michael Weimer2, Sven Werchner1, Jochen Förstner3, Florian Prill3, Daniel Reinert3, Günther Zängl3, Marco Giorgetta4, Roland Ruhnke1, Bernhard Vogel1, and Peter Braesicke1 1Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
2Steinbuch Centre for Computing, Karlsruhe Institute of Technology, Karlsruhe, Germany
3Deutscher Wetterdienst, Offenbach, Germany
4Max Planck Institute for Meteorology, Hamburg, Germany
anow at: ARC Centre of Excellence for Climate System Science, School of Earth Atmosphere and Environment, Monash University, Australia
Abstract. Atmospheric composition studies on weather and climate time scales require flexible, scalable models. The ICOsahedral Nonhydrostatic model with Aerosols and Reactive Trace gases (ICON-ART) provides such an environment. Here, we introduce the most up-to-date version of the flexible tracer framework for ICON-ART and explain its application in one numerical weather forecast and one climate related case study. We demonstrate the implementation of idealised tracers and chemistry tendencies of different complexity using the ART infrastructure. Using different ICON physics configurations for weather and climate with ART, we perform integrations on different time scales, illustrating the model's performance. First, we present a hindcast experiment for the 2002 ozone hole split with two different ozone chemistry schemes using the numerical weather prediction physics configuration. We compare the hindcast with observations and discuss the confinement of the split-vortex using an idealised tracer diagnostic. Secondly, we study AMIP type integrations using a simplified chemistry scheme in conjunction with the climate physics configuration. We use two different simulations: The interactive simulation, where modelled ozone is coupled back to the radiation scheme and the non-interactive simulation that uses a default background climatology of ozone. Additionally, we introduce a chemical source term for water vapour for the interactive simulation. We discuss the impact of stratospheric ozone and water vapour variations in the interactive and non-interactive integrations on the water vapour tape recorder, as a measure of tropical upwelling changes. Additionally we explain the seasonal evolution and latitudinal distribution of the age of air. The age of air is measure of the strength of the meridional overturning circulation with young air in the tropical upwelling region and older air in polar winter downwelling regions. We conclude that our flexible tracer framework allows for tailor-made configurations of ICON-ART in weather and climate applications that are easy to configure and run well.
Citation: Schröter, J., Rieger, D., Stassen, C., Vogel, H., Weimer, M., Werchner, S., Förstner, J., Prill, F., Reinert, D., Zängl, G., Giorgetta, M., Ruhnke, R., Vogel, B., and Braesicke, P.: ICON-ART 2.1 – A flexible tracer framework and its application for composition studies in numerical weather forecasting and climate simulations, Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2017-286, in review, 2018.
Jennifer Schröter et al.
Jennifer Schröter et al.
Jennifer Schröter et al.

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